Baryon and Lepton Number Assignment in $E_6$ Models

Details Baryon and Lepton Number Assignment in $E_6$ Models Baryon and Lepton Number Assignment in $E_6$ Models

1995-04-21

arxiv.org/abs/hep-ph/9504359v1

Phys.Rev. D52 (1995) 1701-1705

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, LaTeX file, 1 submitted Figure file(.eps)

Scientific paper

10.1103/PhysRevD.52.1701

In $E_6$ models there are new particles whose baryon number is not uniquely assigned. We point out that the baryon and lepton number assignment to these particles can change the baryogenesis scenario significantly. We consider left-right symmetric extension of the standard model in which $(B-L)$ quantum number is gauged. The identification of $(B-L)$ with a generator of $E_6$ is used to define the baryon and lepton numbers for the exotic particles in a way that the electroweak baryon and lepton number anomaly corresponding to the $SU(2)_L$ group vanishes, {\it i.e.}, there is no non-perturbative baryon or lepton number violation during the electroweak phase transition. We study some consequences of the new assignment.

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